Transport trailer and method

ABSTRACT

A trailer  10  includes a frame  12  having a central axis  14  spaced between rear wheels. A plurality of storage units  20  are supported on the trailer frame, with each storage unit supporting a plurality of objects thereon. Each storage support has a support axis  22  substantially parallel to the frame central axis. A carriage assembly  24  rotates the plurality of storage supports, and a lift mechanism  30  raises and lowers the carriage assembly.

FIELD OF THE INVENTION

The present invention relates to trailers of the type conventionallyused for transporting objects, including trailers removably connected toa powered operator cab. More particularly, this invention relates to animproved trailer for reducing injury to transport personnel. In oneembodiment, the trailer may be used to transport tires which aresupported on storage racks.

BACKGROUND OF THE INVENTION

Various types of trailers have been devised to transport objects, andtrailers have been specifically designed for transporting one type ofobject. Nevertheless, a considerable time and money are incurred inloading and unloading selected ones of the transported objects at aspecific location. Moreover, trailer workers are commonly injured whenloading and unloading objects from a trailer, particularly when theobjects are heavy and/or bulky.

U.S. Pat. No. 6,814,214 discloses a unitary trailer and powered operatorcab. The trailer includes a pallet and conveyor system for loadingpallets onto the vehicle, with the pallets movable in an elongate loopwith front and rear ends of the loop rotating about an axis parallel tothe vehicle's axis.

Various types of patents disclose systems for generally transportingtires. U.S. Pat. No. 5,927,931 discloses a lift for raising and loweringa stack of tires. U.S. Pat. Nos. 5,027,991 and 5,356,163 each disclosestructures for transporting a single tire. U.S. Pat. No. 6,382,644discloses a transport and a tire and wheel assembly. A device referredto as the Tire Butler being promoted by Mobile Concepts, Inc. uses atrailer for transporting tires. Publication 2001/0028838 and U.S. Pat.No. 6,527,499 also disclose equipment for handling and transportingtires.

U.S. Pat. No. 5,823,558 discloses a trailer loading support. A loaddistribution system for trucks is disclosed in U.S. Pat. No. 6,157,889.Publication 2003/0226470 discloses a rail transport system for bulkmaterials.

The disadvantages of the prior art are overcome by the presentinvention, and an improved trailer and method are hereinafter disclosed.

SUMMARY OF THE INVENTION

In one embodiment, a trailer for transporting objects includes a trailerframe having a central axis spaced between left-side and right-side rearwheels, and a plurality of storage units supported on the trailer frame,with each supporting unit for supporting a plurality of objects thereonand having a storage support axis substantially parallel to the trailerframe central axis. A carriage is provided for rotatably supporting theplurality of storage units about a carriage axis substantially parallelwith the trailer central axis. The lift mechanism raises and lowers thecarriage and thereby the object supported on the storage supports withrespect to the trailer frame.

According to one embodiment of the method of the invention, a trailerframe is provided with a central axis spaced between a left-side rearwall and a right-side rear wall. The method includes supporting aplurality of storage to the ports on the trailer axis, with each storagesupport supporting a plurality of objects thereon, such as tires, andeach storage support having a storage support axis substantiallyparallel to the trailer frame central axis. The method includesrotatably supporting the plurality of storage supports about a carriageaxis substantially parallel with the trailer central axis, and raisingor lowering the carriage and thereby the objects supported on thestorage supports with respect to the trailer frame.

These and further features and advantages of the present invention willbecome apparent from the following detailed description, whereinreference is made to the figures in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a suitable trailer and powered operator cabwith the side doors raised.

FIG. 2 is a rear view of the trailer shown in FIG. 1, with the sidedoors raised.

FIG. 3 is a top view of the trailer shown in FIG. 1, with the side doorsclosed and the operator cab removed.

FIG. 4 is a pictorial view of a portion of the trailer shown in FIG. 1.

FIG. 5 illustrates a portion of the carriage assembly.

FIG. 6 illustrates an upper end of a lifting cylinder and a liftingplate for raising and lowering the carriage assembly.

FIG. 7 illustrates another view of a rotatable lifting cylinder andlifting plate.

FIG. 8 illustrates a portion of a suitable tray supported on thecarriage assembly for holding boxes or other goods.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1 discloses one embodiment of a trailer 10 for transporting tires.For the depicted embodiment, a pickup truck or other powered operatorcab may be used to transport the trailer, or the trailer may be integralwith the powered transport cab.

The trailer includes a trailer frame 12 having a central axis 14 which,as shown in FIG. 3 is spaced between a left-side rear wheel 16 and aright-side rear wheel 18. As disclosed further below, the trailer framesupports a plurality of storage units 20, which for the embodimentdepicted in FIG. 1, is a plurality of tires. Each storage unit has astorage support axis 22 which is substantially parallel to the trailercentral axis 14. A portion of the carriage assembly 24 is shown in FIG.5, and rotatably supports the plurality of tires about a carriage axissubstantially parallel with the trailer central axis. A lift mechanism30 as shown in FIG. 6 is provided for raising and lowering the carriageand thereby the objects supported on the storage units with respect tothe trailer frame.

For the embodiment as shown in FIG. 1, the entirety of the carriage andthe plurality of storage units are forward of the rear wheels of thetrailer. A storage deck 40 is provided above the rear wheels for storingmiscellaneous objects. As explained further below, the carriage assemblymay be raised and lowered, so that when loading or unloading objects,the objects are desirably relatively close to the ground. As shown inFIG. 1, the low position of the tires relative to the ground is achievedby providing a lower portion 36 of the trailer frame which is verticallybelow the centerline of the wheels 16, 18. In a preferred embodiment,the trailer frame supports moveable side panels 50, which may be loweredto be flush with the exterior of the frame during transport, as shown inFIG. 3, but may be raised as shown in FIGS. 1 and 2 when the trailer isparked to allow for full viewing of the carriage operation.

FIG. 4 shows in further detail suitable components of the trailer 10.The frame 12 includes a pair of spaced apart front guides 52, with eachguide suitably formed by a C-channel. A similar pair of rear guides 54are also shown. These guides allow for the selective raising andlowering of the carriage by a pair of powered fluid cylinders 58. Alower portion of cylinder 58 is shown in FIG. 4 between the pair offront guides 52 and resting on a frame guide base 53. FIG. 4 alsoillustrates a suitable rear deck 40 for storage of miscellaneouscomponents, including a power unit 60 for powering operation of thecarriage assembly.

FIG. 5 illustrates a portion of the carriage assembly 24 which, for thedepicted embodiment, includes 4 storage units each having a central axis22 so that the storage unit may rotate as a subassembly about pivot 46with respect to rotatable carriage end plate 62. For handling tires, thestorage unit may include rods or other elongate supports 42, 44 as shownin FIG. 5, each extending between the spaced apart end plates 62 of thecarriage assembly.

The carriage assembly 24 may be raised or lowered by a lift mechanism 30including a pair of powered cylinders 58 and a guide plate 62 at theupper end of each cylinder. The moveable plate 62 includes a pluralityof rollers or other suitable guides 64, which are guided by the frontand rear supports for raising and lowering the carriage assembly.

FIG. 6 also discloses a suitable drive unit 66, which may rotate gear 68as shown in FIG. 7, thereby driving gear 70. Gear 70 may then be securedto a respective end plate 60, so that operation of motor 66 controllablyrotates the carousel assembly about its central axis 26. A similar driveassembly is provided at the other end of the carriage assembly forsimultaneously raising or lowering the other end of the carousel.

Various controls 70, 72 may be provided at desired locations on thetrailer, including the sides of the trailer where objects are loaded andunloaded onto and from the storage units, and at the rear of the trailernear the power unit 60. These controls may be regulated by an operatorto slowly raise the carousel, thereby allowing activation of the motor66 to rotate the carousel so that the desired storage rack with theobjects to be unloaded and loaded may be positioned on the desired sideof the trailer and close to the ground. These controls 70, 72, ifdesired, may rotate the carousel in either a clockwise or acounterclockwise direction. Safety circuits may be used to ensure thatthe carousel is not rotated until raised to a sufficient level so thatthe carousel can rotate without hitting the lower frame of the trailer.

The storage supports as disclosed herein comprise a plurality of rackswhich are free to rotate with respect to the carriage end plates. Inmost applications, three or more racks may be equally spacedcircumferentially about the carriage. A significant feature of thecarriage assembly is that it allows the operator to load or unload goodsfrom either side of the trailer. In some applications, the right-side ofthe trailer may be blocked, yet the operator may easily and safetyunload goods from the left-side of the trailer. At the next deliveryspot, the operator has the flexibility of unloading from the left-sideof the trailer when the right-side of the trailer is blocked.

Depending on the goods being transported, the rotatable carriageassembly may benefit significantly from a lift mechanism, as disclosedherein. In other applications, and particularly those wherein the goodsare relatively light, such as goods transported in the snack foodindustry, a lift mechanism for raising and lowering the carriage may notbe necessary.

The trailer as disclosed herein may be used for transporting variousobjects other than tires. Bottles of water may be transported in asimilar manner to tires, and oils or other liquids may be transported indrums or boxes. A conventional shelf or tray rather than space rods maybe used to support a plurality of boxes between the end plates, and sucha support tray would be suitable for transporting vehicular batteries,package delivery boxes, and various products distributed to retail foodstores, including produce, dairy products, cookies/crackers, bread, andpotato chips. A tray 80 as shown in FIG. 8 may extend between the endplates 62 replacing the purpose of the rods 42, 44. The tray 86preferably having a base or floor 82, and sides 84, 86. The tray 86 maybe suitably supported to hold to the weight of the goods between the endplates 62.

The term “trailer” as used herein refers to a trailer removablyconnected to a powered operator cab, whether termed a tractor, a truck,or a cab, and includes fifth wheel trailers and gooseneck trailers. A“trailer” also includes the trailer portion of cab/trailer combinations,whether detachable from the cab or integral with the cab. A conventionalutility truck for delivery of parcels or bread is thus considered toinclude a trailer which is fixed to rather than removable from the cab.The trailer of the present invention offers the ability to sort variousproducts for delivery or pickup, to load the goods curbside on eitherside of the trailer, and to handle heavy objects without significantlifting. A refrigerated trailer may be used for transporting dairyproducts, meat, or seafood.

Although specific embodiments of the invention have been describedherein in some detail, this has been done solely for the purposes ofexplaining the various aspects of the invention, and is not intended tolimit the scope of the invention as defined in the claims which follow.Those skilled in the art will understand that the embodiment shown anddescribed is exemplary, and various other substitutions, alterations andmodifications, including but not limited to those design alternativesspecifically discussed herein, may be made in the practice of theinvention without departing from its scope.

1. A trailer for transporting objects, comprising: a trailer framesupported on a plurality of wheels for moving the trailer frame alongpublic roadways having a longitudinal axis spaced between a left-siderear wheel and a right-side rear wheel, the trailer frame having a sideopening for access to the transported objects; a rotatable carriagewithin the trailer frame having a carriage axis substantially parallelto the trailer frame longitudinal axis, the carriage rotatable about thecarriage axis; at least one movable side panel supported on the trailerframe and having a lower closed position extending below the carriageaxis to close the opening and an upper open position, the at least onemovable side panel when in the upper open position exposing the openingin the trailer frame for access to the transported objects; a pluralityof storage supports supported on the rotatable carriage for simultaneousrotation about the carriage axis to position a selected storage supportadjacent a side of the trailer frame for loading and unloading objectswhen the at least one side panel is in the open position, each storagesupport support axis substantially parallel to the trailer frame centralaxis; and a lift mechanism for raising and lowering the rotatablecarriage with respect to the trailer frame and thereby the objectssupported on the storage supports.
 2. A trailer as defined in claim 1,wherein the entirety of the rotatable carriage and the plurality ofstorage supports are forward of the rear wheels.
 3. A trailer as definedin claim 2, further comprising: a storage deck above both the left-sideand right-side rear wheels.
 4. A trailer as defined in claim 1, whereinlower portion of the trailer frame is below the centerline of the rearwheels.
 5. A trailer as defined in claim 1, wherein said trailer frameis supported on a trailer chassis and includes a pair of movable sidepanels on opposing sides of the trailer frame longitudinal axis.
 6. Atrailer as defined in claim 1, wherein each storage support comprises apair of spaced apart elongate generally horizontal support members.
 7. Atrailer as defined in claim 6, wherein each support member includes apivot for rotating with respect to the rotatable carriage.
 8. A trailerfor transporting objects along public roadways, comprising: a trailerframe having a longitudinal axis spaced between a left-side rear wheeland a right-side rear wheel and defining an interior storage space, thetrailer frame having a side orening for access to the transrortedobjects; a plurality of storage supports supported on the trailerchassis within the storage space, each storage support supporting aplurality of objects thereon, each storage support having a storagesupport axis substantially parallel to the trailer frame central axis; apowered carriage within the storage space for rotatably supporting theplurality of storage supports about a carriage axis substantiallyparallel with the trailer longitudinal axis to position a selectedstorage support adjacent a side of the trailer frame for loading andunloading objects, the powered carriage rotatable about the carriageaxis; at least one movable side panel supported on the trailer frame andhaving a lower closed position extending below the carriage axis toclose the opening and an upper open position, the at least one movableside panel when in the upper open position exposing the opening in thetrailer frame for access to the transported objects; a rotation controlmember for automatically stopping rotation of the powered carriage whena selected storage support is adjacent the side of the trailer frame forloading or unloading objects; and a lift mechanism for raising andlowering the rotatable carriage with respect to the trailer chassis andthereby the objects supported on the storage supports.
 9. A trailer asdefined in claim 8, wherein lower portion of the trailer frame is belowthe centerline for both the left-side and right-side wheels.
 10. Atrailer as defined in claim 8, wherein each storage support comprises apair of spaced apart elongate generally horizontal support members. 11.A trailer as defined in claim 10, wherein each support member pivotswith respect to the carriage.
 12. A trailer as defined in claim 8,wherein the entirety of the carriage and the plurality of storagesupports are forward of rear wheels of the trailer and a storage areaabove both the left-side and right-side rear wheels.
 13. A method oftransporting objects along public roadways and unloading one or moreobjects at a delivery site, comprising: providing a trailer frame havinga longitudinal axis spaced between a left-side rear wheel and aright-side rear wheel, the trailer frame having an opening for access tothe transported objects; providing a rotatable carriage having acarriage axis substantially parallel to the trailer frame central axis,the carriage rotatable about the carriage axis; providing at least onemovable side panel supported on the trailer frame and having a lowerclosed position extending below the carriage axis to close the openingand an upper open position, the at least one movable side panel when inthe upper open position exposing the opening in the trailer frame foraccess to the transported objects; storage support axis substantiallyparallel to the trailer frame central axis; loading and unloadingobjects when the at least one side panel is in the open position; andraising or lowering the carriage and thereby the objects supported onthe storage supports with respect to the trailer frame.
 14. A method asdefined in claim 13, further comprising: providing a powered rotator forrotating the plurality of supports about the carriage axis; andautomatically stopping rotation of the powered carriage when a selectedstorage support is adjacent the side of the trailer frame for loading orunloading objects.
 15. A method as defined in claim 13, furthercomprising: rotatably supporting the plurality of storage supports aboutthe carriage axis substantially parallel with the trailer longitudinalaxis.
 16. A method as defined in claim 13, wherein each storage supportis sized to receive a plurality of tires.